var treeData = [{
    id: 1,
    title: '一级菜单',
    pid: 0
}, {
    id: 2,
    title: '二级单01',
    pid: 1
}, {
    id: 21,
    title: '二级单02',
    pid: 2
}, {
    id: 22,
    title: '二级单03',
    pid: 21
}, {
    id: 23,
    title: '二级单03',
    pid: 22
}, {
    id: 5,
    title: '一级菜单02',
    pid: 0
}, {
    id: 6,
    title: '二菜单01',
    pid: 5
}, {
    id: 7,
    title: '三菜单01',
    pid: 6
}, {
    id: 8,
    title: '三菜单02',
    pid: 6
}, {
    id: 9,
    title: '四级菜单01',
    pid: 8
}, {
    id: 10,
    title: '四级菜单02',
    pid: 8
}, {
    id: 11,
    title: '二级菜单01',
    pid: 5
}, {
    id: 12,
    title: '二级菜单02',
    pid: 5
}, {
    id: 20,
    title: '一级菜单03',
    pid: 0
}, {
    id: 21,
    title: '一级菜单03',
    pid: 20
}, {
    id: 100,
    title: '一级菜单03',
    pid: 0
}, {
    id: 101,
    title: '一级菜单03',
    pid: 100
}, {
    id: 102,
    title: '一级菜单03',
    pid: 101
}, {
    id: 103,
    title: '一级菜单03',
    pid: 102
}, {
    id: 104,
    title: '一级菜单03',
    pid: 103
}, {
    id: 105,
    title: '一级菜单03',
    pid: 104
}, {
    id: 106,
    title: '一级菜单03',
    pid: 105
}, {
    id: 107,
    title: '一级菜单03',
    pid: 105
}, {
    id: 1000,
    title: '一级菜单03',
    pid: 0
}, {
    id: 1001,
    title: '一级菜单03',
    pid: 1000
}, {
    id: 1002,
    title: '一级菜单03',
    pid: 1000
}, {
    id: 1003,
    title: '一级菜单03',
    pid: 1001
}, {
    id: 1004,
    title: '一级菜单03',
    pid: 1001
}, {
    id: 1005,
    title: '一级菜单03',
    pid: 1002
}, {
    id: 1006,
    title: '一级菜单03',
    pid: 1002
}, {
    id: 1007,
    title: '一级菜单03',
    pid: 1005
}, {
    id: 1008,
    title: '一级菜单03',
    pid: 1005
}];